What is De-Mineralized water treatment plants.
The process of removal of minerals and salt from the water by passing the water from cation and anion resin is called Demineralization. This process makes the water (almost) free from all the dissolved minerals by using one out of these two following processes.
Zebra water system is manufacturing the De-Mineralized water treatment plants from past twelve years we have cater the industries like battery manufacturers, juice and beverage industry, electroplating, gold plating, LRG Dm plants for pharma and laboratories and cosmetic industry.
How Does Demineralization Treatment Plant Work
In the matter of purification the impure ions of water are replaced by the ions of Resin. The impure ions are given to resin which has to recreate for the restoration of original ionic form periodically. The below mentioned ions are commonly found in raw form of water and it is removed by the De-Mineralized water treatment plants.
1. Nitrate (NO3-)
2. Carbonate (CO32-)
3. Chloride (CI-)
4. Alkalinity (CO32-, HCO3-)
5. Bicarbonate (HCO3-)
6. Sulphate (SO42-)
7. Silica (SiO2)
1. Calcium (CA2+)
2. Sodium (NA+)
3. Magnesium (Mg2+)
4. Iron (Fe3+)
5. Potassium (K+)
6. Manganese (M)n2+
As mentioned above, there are mainly two kinds of resins i.e.- Anion Exchange Resins and Cation Exchange Resins. Anion exchange resins releases hydroxyl (OH-) ions or negatively charged ions as exchange for the impure anions in water. On the other hand, Cation exchange resins will release hydrogen (H+) ions and other positive charged ions as exchange for the impure anions in water.
For most of the labs and industrial applications, highly-pure water mainly free from ionic contaminants is needed. Water of such quality can be created by Deionization. There are two types of deionization which are-
1. Mixed-Bed Deionization
2. Two-Bed Deionization
In this form of deionization, the anion exchange and cation exchange resins are mixed in single pressure vessel. The complete mixture of anion exchange and cation exchange resins in single column creates a mixed-bed deionizer equal to the lengthy chain of two-bed plants. Because of this, the water quality derived by mixed-bed deionizer is much higher then the two-bed plants. Though mixed-bed plants are more sensitive towards the impurities in the water supply which involves more complicated regeneration process.
The two-Bed Deionization process is a combination of two vessels. One vessel contains Cation Exchange Resins in the shape of Hydrogen (H+) whereas the other contains Anion Exchange Resins in Hydroxyl (OH-) form. Water flows within cation columns where all cations are replaced for hydrogen ions. To keep the water balanced, one hydrogen ion is exchanged for monovalent cation on the other hand, two hydrogen ions are exchanged for one divalent cation. This is the same principal applies during the ion exchange. then the water flows through the anion column where all the negative charge ions are exchanged for hydroxide ions which then connect with hydrogen to form water.